The Functional Assessment Staging Tool (FAST)

The Functional Assessment Staging Tool (FAST) was intended to more specifically describe the progressive stages of Alzheimer’s disease (AD). FAST divides the disease progression into seven stages but then further divides Stage 6 and 7 into more detailed substages to demonstrate specific losses as follows.

The developmental age at which a child gains the listed skill that is being lost at each AD substage is listed, an illustration of retrogenesis.